<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=in, initial-scale=1.0">
    <title>Document</title>
    <style>
        .rey{
            width: auto;
            height: 500px;
            margin: auto;
            background-color: orange;
            border: 120px solid green;
        }
        .reu{
            height: auto;
            text-align: center;
            line-height: 450px;
            font-weight: normal;
        }
    </style>
</head>
<body>
    <div class="rey">    
        <div class="reu">
        <script type="text/javascript" src="hello.js"></script>
        </div>
    </div>
</body>
</html>